（二）二进制安装k8s1.11版本之etcd集群部署

创建etcd证书请求

# cat >/server/ssl/etcd-csr.json <<EOF
{
  "CN": "etcd",
  "hosts": [
    "127.0.0.1",
"192.168.213.131",
"192.168.213.132",
"192.168.213.133"
  ],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "Hangzhou",
      "L": "Hangzhou",
      "O": "k8s",
      "OU": "System"
    }
  ]
}
EOF

生成etcd证书和私钥

cd /server/ssl/
cfssl gencert -ca=ca.pem  -ca-key=ca-key.pem -config=ca-config.json  -profile=kubernetes etcd-csr.json | cfssljson -bare etcd

把etcd证书和私钥scp到etcd节点上

把ca证书和etcd证书相关文件scp到etcd节点上
scp etcd*.pem ca*.pem master01:/opt/kubernetes/ssl 
scp etcd*.pem ca*.pem master02:/opt/kubernetes/ssl 
scp etcd*.pem ca*.pem node01:/opt/kubernetes/ssl 

下载etcd包, 分发到etcd集群节点上

cd /tools 
wget https://github.com/coreos/etcd/releases/download/v3.3.2/etcd-v3.3.2-linux-amd64.tar.gz
tar xf etcd-v3.3.2-linux-amd64.tar.gz
cd etcd-v3.3.2-linux-amd64
scp etcd* master01:/opt/kubernetes/bin/
scp etcd* master02:/opt/kubernetes/bin/
scp etcd* node01:/opt/kubernetes/bin/

准备etcd配置文件

master01的配置文件

# cat >/opt/kubernetes/cfg/etcd <<EOF
#[Member]
ETCD_NAME="etcd01"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.213.131:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.213.131:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.213.131:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.213.131:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.213.131:2380,etcd02=https://192.168.213.132:2380,etcd03=https://192.168.213.133:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
EOF

master02的配置文件

# cat >/opt/kubernetes/cfg/etcd <<EOF
#[Member]
ETCD_NAME="etcd02"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.213.132:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.213.132:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.213.132:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.213.132:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.213.131:2380,etcd02=https://192.168.213.132:2380,etcd03=https://192.168.213.133:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
EOF

node01的配置文件

# cat >/opt/kubernetes/cfg/etcd <<EOF
#[Member]
ETCD_NAME="etcd03"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.213.133:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.213.133:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.213.133:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.213.133:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.213.131:2380,etcd02=https://192.168.213.132:2380,etcd03=https://192.168.213.133:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
EOF

准备etcd的服务启动脚本, 三台etcd集群的启动脚本文件一致

# cat >/usr/lib/systemd/system/etcd.service <<EOF
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target

[Service]
Type=notify
EnvironmentFile=-/opt/kubernetes/cfg/etcd
ExecStart=/opt/kubernetes/bin/etcd \
--name=\${ETCD_NAME} \
--data-dir=\${ETCD_DATA_DIR} \
--listen-peer-urls=\${ETCD_LISTEN_PEER_URLS} \
--listen-client-urls=\${ETCD_LISTEN_CLIENT_URLS},http://127.0.0.1:2379 \
--advertise-client-urls=\${ETCD_ADVERTISE_CLIENT_URLS} \
--initial-advertise-peer-urls=\${ETCD_INITIAL_ADVERTISE_PEER_URLS} \
--initial-cluster=\${ETCD_INITIAL_CLUSTER} \
--initial-cluster-token=\${ETCD_INITIAL_CLUSTER} \
--initial-cluster-state=new \
--cert-file=/opt/kubernetes/ssl/etcd.pem \
--key-file=/opt/kubernetes/ssl/etcd-key.pem \
--peer-cert-file=/opt/kubernetes/ssl/etcd.pem \
--peer-key-file=/opt/kubernetes/ssl/etcd-key.pem \
--trusted-ca-file=/opt/kubernetes/ssl/ca.pem \
--peer-trusted-ca-file=/opt/kubernetes/ssl/ca.pem
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target
EOF

开机启动和设置环境变量

systemctl enable etcd 
systemctl start etcd
echo "export PATH=$PATH:/opt/kubernetes/bin" >>/etc/profile 
source /etc/profile 

验证etcd集群

cd /opt/kubernetes/ssl/
etcdctl --ca-file=ca.pem --cert-file=etcd.pem --key-file=etcd-key.pem --endpoints="https://192.168.213.131:2379,https://192.168.213.132:2379,https://192.168.213.133:2379" cluster-health